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Late Quaternary vegetation changes around Lake Rutundu, Mount Kenya, East Africa : evidence from grass cuticles, pollen and stable carbon isotopes

journal contribution
posted on 2017-12-06, 00:00 authored by M Wooller, David SwainDavid Swain, K Ficken, A Agnew, A Street-Perrott, G Eglinton
Woody, subalpine shrubs and grasses currently surround Lake Rutundu, Mount Kenya. Multiple proxies, including carbon isotopes, pollen and grass cuticles, from a 755-cm-long core were used to reconstruct the vegetation over the past 38 300 calendar years. Stable carbon-isotope ratios of total organic carbon and terrestrial biomarkers from the lake sediments imply that the proportion of terrestrial plants using the C4 photosynthetic pathway was greater during the Late Pleistocene than in the Holocene. Pollen data show that grasses were a major constituent of the vegetation throughout the Late Pleistocene and Holocene. The proportion of grass pollen relative to the pollen from other plants was greatest at the last glacial maximum (LGM). Grass cuticles confirm evidence that C4 grass taxa were present at the LGM and that the majority followed the cold-tolerant NADP-ME C4 subpathway.

History

Volume

18

Issue

1

Start Page

3

End Page

15

Number of Pages

13

eISSN

1099-1417

ISSN

0267-8179

Location

United Kindom

Publisher

John Wiley & Sons

Language

en-aus

Peer Reviewed

  • Yes

Open Access

  • No

External Author Affiliations

Dept. of Earth Sciences; University of Wales Swansea; University of Wales, Aberystwyth;

Era Eligible

  • Yes

Journal

Journal of quaternary science.

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